My indoor training has been going well enough that I'm pretty much relegating my outdoor rides to 2nd-class status for training priority. My gains will be primarily made and tracked with my indoor setup, specifically, with Kickr+Trainerroad. I could never gradually ratchet up the wattage this precisely without these tools.
Outdoor riding for me will be for the rare day I get off, without prioritizing improvement. (Riding outdoors is still always more fun than indoors, as I said above!)